In article <31262A99.12F4 at qm.salk.edu> SL Forsburg <susan_forsburg at qm.salk.edu> writes:
>I was always told it was SAICAR but that forms downstream of ade1/2
>function, so that must be in error. As I recall, cells must also be
>respiratory competent to develop the color.
>
As a ugrad, I did some work in developing a screen in Neurospora
of vacuolar-ATPase function based on the ad3a mutation. This work
was initially done by Foury in Saccharomyces. Basic idea: knockout
of V-ATPase function turned red ade mutants back to wildtype color.
This can be used as a screen for V-ATPase mutants.
Here is what I believe is the reference:
Foury F.
The 31-kDa polypeptide is an essential subunit of the vacuolar ATPase in
Saccharomyces cerevisiae.
Journal of Biological Chemistry, 1990 Oct 25, 265(30):18554-60.
I hope that helps.
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